src/flac/encode.c

   1 /* flac - Command-line FLAC encoder/decoder
   2  * Copyright (C) 2000,2001  Josh Coalson
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; either version 2
   7  * of the License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 /*@@@ need to "_finish()" the verify decoder */
  20
  21 #include <assert.h>
  22 #if defined _WIN32 && !defined __CYGWIN__
  23 /* where MSVC puts unlink() */
  24 # include <io.h>
  25 #else
  26 # include <unistd.h>
  27 #endif
  28 #include <stdio.h> /* for FILE et al. */
  29 #include <stdlib.h> /* for malloc */
  30 #include <string.h> /* for strcmp() */
  31 #include "FLAC/all.h"
  32 #include "encode.h"
  33
  34 #ifdef min
  35 #undef min
  36 #endif
  37 #define min(x,y) ((x)<(y)?(x):(y))
  38
  39 #define CHUNK_OF_SAMPLES 2048
  40
  41 typedef enum {
  42         FLAC__VERIFY_OK,
  43         FLAC__VERIFY_FAILED_IN_FRAME,
  44         FLAC__VERIFY_FAILED_IN_METADATA
  45 } verify_code;
  46
  47 typedef struct {
  48         int32 *original[FLAC__MAX_CHANNELS];
  49         unsigned size; /* of each original[] in samples */
  50         unsigned tail; /* in wide samples */
  51         const byte *encoded_signal;
  52         unsigned encoded_signal_capacity;
  53         unsigned encoded_bytes;
  54         bool into_frames;
  55         verify_code result;
  56         FLAC__StreamDecoder *decoder;
  57 } verify_fifo_struct;
  58
  59 typedef struct {
  60         FILE *fout;
  61         const char *outfile;
  62         FLAC__Encoder *encoder;
  63         bool verify;
  64         bool verbose;
  65         uint64 unencoded_size;
  66         uint64 total_samples_to_encode;
  67         uint64 bytes_written;
  68         uint64 samples_written;
  69         unsigned current_frame;
  70         verify_fifo_struct verify_fifo;
  71 } encoder_wrapper_struct;
  72
  73 static bool is_big_endian_host;
  74
  75 static unsigned char ucbuffer[CHUNK_OF_SAMPLES*FLAC__MAX_CHANNELS*(FLAC__MAX_BITS_PER_SAMPLE>>3)];
  76 static signed char *scbuffer = (signed char *)ucbuffer;
  77 static uint16 *usbuffer = (uint16 *)ucbuffer;
  78 static int16 *ssbuffer = (int16 *)ucbuffer;
  79
  80 static int32 in[FLAC__MAX_CHANNELS][CHUNK_OF_SAMPLES];
  81 static int32 *input[FLAC__MAX_CHANNELS];
  82
  83 /* local routines */
  84 static bool init(encoder_wrapper_struct *encoder_wrapper);
  85 static bool init_encoder(bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned channels, unsigned bps, unsigned sample_rate, unsigned padding, encoder_wrapper_struct *encoder_wrapper);
  86 static void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper);
  87 static FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data);
  88 static void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data);
  89 static FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data);
  90 static FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data);
  91 static void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
  92 static void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
  93 static void print_stats(const encoder_wrapper_struct *encoder_wrapper);
  94 static bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok);
  95 static bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok);
  96
  97 int encode_wav(const char *infile, const char *outfile, bool verbose, uint64 skip, bool verify, bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding)
  98 {
  99         encoder_wrapper_struct encoder_wrapper;
 100         FILE *fin;
 101         bool is_unsigned_samples;
 102         unsigned channels, bps, sample_rate, data_bytes;
 103         size_t bytes_per_wide_sample, bytes_read;
 104         uint16 x;
 105         uint32 xx;
 106
 107         encoder_wrapper.encoder = 0;
 108         encoder_wrapper.verify = verify;
 109         encoder_wrapper.verbose = verbose;
 110         encoder_wrapper.bytes_written = 0;
 111         encoder_wrapper.samples_written = 0;
 112         encoder_wrapper.outfile = outfile;
 113
 114         if(0 == strcmp(infile, "-")) {
 115                 fin = stdin;
 116         }
 117         else {
 118                 if(0 == (fin = fopen(infile, "rb"))) {
 119                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 120                         return false;
 121                 }
 122         }
 123         if(0 == strcmp(outfile, "-")) {
 124                 encoder_wrapper.fout = stdout;
 125         }
 126         else {
 127                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 128                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 129                         fclose(fin);
 130                         return false;
 131                 }
 132         }
 133
 134         if(!init(&encoder_wrapper))
 135                 goto wav_abort_;
 136
 137         /*
 138          * check the RIFF chunk
 139          */
 140         if(!read_little_endian_uint32(fin, &xx, false))
 141                 goto wav_abort_;
 142         if(xx != 0x46464952) { /* "RIFF" */
 143                 fprintf(stderr, "ERROR: no RIFF header\n");
 144                 goto wav_abort_;
 145         }
 146         if(!read_little_endian_uint32(fin, &xx, false))
 147                 goto wav_abort_;
 148
 149         /*
 150          * now process the WAVE chunk
 151          */
 152         if(!read_little_endian_uint32(fin, &xx, true))
 153                 goto wav_end_;
 154         if(xx != 0x45564157) { /* "WAVE" */
 155                 fprintf(stderr, "ERROR: no WAVE header\n");
 156                 goto wav_abort_;
 157         }
 158
 159         /* do the format sub-chunk */
 160         if(!read_little_endian_uint32(fin, &xx, false))
 161                 goto wav_abort_;
 162         if(xx != 0x20746d66) { /* "fmt " */
 163                 fprintf(stderr, "ERROR: no format sub-chunk\n");
 164                 goto wav_abort_;
 165         }
 166         /* fmt chunk size */
 167         if(!read_little_endian_uint32(fin, &xx, false))
 168                 goto wav_abort_;
 169         if(xx != 16) {
 170                 fprintf(stderr, "ERROR: unsupported chunk\n");
 171                 goto wav_abort_;
 172         }
 173         /* compression code */
 174         if(!read_little_endian_uint16(fin, &x, false))
 175                 goto wav_abort_;
 176         if(x != 1) {
 177                 fprintf(stderr, "ERROR: unsupported compression type %u\n", (unsigned)x);
 178                 goto wav_abort_;
 179         }
 180         /* number of channels */
 181         if(!read_little_endian_uint16(fin, &x, false))
 182                 goto wav_abort_;
 183         if(x == 0 || x > FLAC__MAX_CHANNELS) {
 184                 fprintf(stderr, "ERROR: unsupported number channels %u\n", (unsigned)x);
 185                 goto wav_abort_;
 186         }
 187         channels = x;
 188         /* sample rate */
 189         if(!read_little_endian_uint32(fin, &xx, false))
 190                 goto wav_abort_;
 191         if(xx == 0 || xx > FLAC__MAX_SAMPLE_RATE) {
 192                 fprintf(stderr, "ERROR: unsupported sample rate %u\n", (unsigned)xx);
 193                 goto wav_abort_;
 194         }
 195         sample_rate = xx;
 196         /* avg bytes per second (ignored) */
 197         if(!read_little_endian_uint32(fin, &xx, false))
 198                 goto wav_abort_;
 199         /* block align (ignored) */
 200         if(!read_little_endian_uint16(fin, &x, false))
 201                 goto wav_abort_;
 202         /* bits per sample */
 203         if(!read_little_endian_uint16(fin, &x, false))
 204                 goto wav_abort_;
 205         if(x != 8 && x != 16) {
 206                 fprintf(stderr, "ERROR: unsupported bits per sample %u\n", (unsigned)x);
 207                 goto wav_abort_;
 208         }
 209         bps = x;
 210         is_unsigned_samples = (x == 8);
 211
 212         /* do the data sub-chunk */
 213         if(!read_little_endian_uint32(fin, &xx, false))
 214                 goto wav_abort_;
 215         if(xx != 0x61746164) { /* "data" */
 216                 fprintf(stderr, "ERROR: no data sub-chunk\n");
 217                 goto wav_abort_;
 218         }
 219         /* data size */
 220         if(!read_little_endian_uint32(fin, &xx, false))
 221                 goto wav_abort_;
 222         data_bytes = xx;
 223
 224         bytes_per_wide_sample = channels * (bps >> 3);
 225
 226         if(skip > 0) {
 227                 if(fin != stdin) {
 228                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_CUR)) {
 229                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 230                                 goto wav_abort_;
 231                         }
 232                 }
 233                 else {
 234                         int64 left;
 235                         unsigned need;
 236                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 237                                 need = min(left, CHUNK_OF_SAMPLES);
 238                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
 239                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 240                                         goto wav_abort_;
 241                                 }
 242                         }
 243                 }
 244         }
 245
 246         encoder_wrapper.total_samples_to_encode = data_bytes / bytes_per_wide_sample - skip;
 247         encoder_wrapper.unencoded_size = encoder_wrapper.total_samples_to_encode * bytes_per_wide_sample + 44; /* 44 for the size of the WAV headers */
 248
 249         if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, rice_optimization_level, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, &encoder_wrapper))
 250                 goto wav_abort_;
 251
 252         encoder_wrapper.verify_fifo.into_frames = true;
 253
 254         while(data_bytes > 0) {
 255                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 256                 if(bytes_read == 0) {
 257                         if(ferror(fin)) {
 258                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 259                                 goto wav_abort_;
 260                         }
 261                         else if(feof(fin))
 262                                 break;
 263                 }
 264                 else {
 265                         if(bytes_read > data_bytes)
 266                                 bytes_read = data_bytes; /* chop off anything after the end of the data chunk */
 267                         if(bytes_read % bytes_per_wide_sample != 0) {
 268                                 fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 269                                 goto wav_abort_;
 270                         }
 271                         else {
 272                                 unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 273                                 format_input(wide_samples, false, is_unsigned_samples, channels, bps, &encoder_wrapper);
 274                                 if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 275                                         fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 276                                         goto wav_abort_;
 277                                 }
 278                                 data_bytes -= bytes_read;
 279                         }
 280                 }
 281         }
 282
 283 wav_end_:
 284         if(encoder_wrapper.encoder) {
 285                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 286                         FLAC__encoder_finish(encoder_wrapper.encoder);
 287                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 288         }
 289         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 290                 print_stats(&encoder_wrapper);
 291                 printf("\n");
 292         }
 293         if(verify) {
 294                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 295                         printf("Verify FAILED!  Do not use %s\n", outfile);
 296                         return 1;
 297                 }
 298                 else {
 299                         printf("Verify succeeded\n");
 300                 }
 301         }
 302         fclose(fin);
 303         return 0;
 304 wav_abort_:
 305         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 306                 printf("\n");
 307         if(encoder_wrapper.encoder) {
 308                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 309                         FLAC__encoder_finish(encoder_wrapper.encoder);
 310                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 311         }
 312         if(verify) {
 313                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 314                         printf("Verify FAILED!  Do not use %s\n", outfile);
 315                         return 1;
 316                 }
 317                 else {
 318                         printf("Verify succeeded\n");
 319                 }
 320         }
 321         fclose(fin);
 322         unlink(outfile);
 323         return 1;
 324 }
 325
 326 int encode_raw(const char *infile, const char *outfile, bool verbose, uint64 skip, bool verify, bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned padding, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, unsigned sample_rate)
 327 {
 328         encoder_wrapper_struct encoder_wrapper;
 329         FILE *fin;
 330         size_t bytes_read;
 331         const size_t bytes_per_wide_sample = channels * (bps >> 3);
 332
 333         encoder_wrapper.encoder = 0;
 334         encoder_wrapper.verify = verify;
 335         encoder_wrapper.verbose = verbose;
 336         encoder_wrapper.bytes_written = 0;
 337         encoder_wrapper.samples_written = 0;
 338         encoder_wrapper.outfile = outfile;
 339
 340         if(0 == strcmp(infile, "-")) {
 341                 fin = stdin;
 342         }
 343         else {
 344                 if(0 == (fin = fopen(infile, "rb"))) {
 345                         fprintf(stderr, "ERROR: can't open input file %s\n", infile);
 346                         return false;
 347                 }
 348         }
 349         if(0 == strcmp(outfile, "-")) {
 350                 encoder_wrapper.fout = stdout;
 351         }
 352         else {
 353                 if(0 == (encoder_wrapper.fout = fopen(outfile, "wb"))) {
 354                         fprintf(stderr, "ERROR: can't open output file %s\n", outfile);
 355                         fclose(fin);
 356                         return false;
 357                 }
 358         }
 359
 360         if(!init(&encoder_wrapper))
 361                 goto raw_abort_;
 362
 363         /* get the file length */
 364         if(0 != fseek(fin, 0, SEEK_END)) {
 365                 encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 366         }
 367         else {
 368                 long filesize;
 369                 fflush(fin);
 370                 if(-1 == (filesize = ftell(fin))) {
 371                         encoder_wrapper.total_samples_to_encode = encoder_wrapper.unencoded_size = 0;
 372                 }
 373                 else {
 374                         encoder_wrapper.unencoded_size = filesize - skip * bytes_per_wide_sample;
 375                         encoder_wrapper.total_samples_to_encode = filesize / bytes_per_wide_sample - skip;
 376                 }
 377         }
 378
 379         if(skip > 0) {
 380                 if(fin != stdin) {
 381                         if(-1 == fseek(fin, bytes_per_wide_sample * (unsigned)skip, SEEK_SET)) {
 382                                 fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 383                                 goto raw_abort_;
 384                         }
 385                 }
 386                 else {
 387                         int64 left;
 388                         unsigned need;
 389                         for(left = (int64)skip; left > 0; left -= CHUNK_OF_SAMPLES) {
 390                                 need = min(left, CHUNK_OF_SAMPLES);
 391                                 if(fread(ucbuffer, 1, bytes_per_wide_sample * need, fin) < need) {
 392                                         fprintf(stderr, "ERROR seeking while skipping samples in input file %s\n", infile);
 393                                         goto raw_abort_;
 394                                 }
 395                         }
 396                 }
 397         }
 398         else {
 399                 fseek(fin, 0, SEEK_SET);
 400         }
 401
 402         if(!init_encoder(lax, do_mid_side, loose_mid_side, do_exhaustive_model_search, do_qlp_coeff_prec_search, rice_optimization_level, max_lpc_order, blocksize, qlp_coeff_precision, channels, bps, sample_rate, padding, &encoder_wrapper))
 403                 goto raw_abort_;
 404
 405         encoder_wrapper.verify_fifo.into_frames = true;
 406
 407         while(!feof(fin)) {
 408                 bytes_read = fread(ucbuffer, sizeof(unsigned char), CHUNK_OF_SAMPLES * bytes_per_wide_sample, fin);
 409                 if(bytes_read == 0) {
 410                         if(ferror(fin)) {
 411                                 fprintf(stderr, "ERROR reading from %s\n", infile);
 412                                 goto raw_abort_;
 413                         }
 414                 }
 415                 else if(bytes_read % bytes_per_wide_sample != 0) {
 416                         fprintf(stderr, "ERROR, got partial sample from input file %s\n", infile);
 417                         goto raw_abort_;
 418                 }
 419                 else {
 420                         unsigned wide_samples = bytes_read / bytes_per_wide_sample;
 421                         format_input(wide_samples, is_big_endian, is_unsigned_samples, channels, bps, &encoder_wrapper);
 422                         if(!FLAC__encoder_process(encoder_wrapper.encoder, input, wide_samples)) {
 423                                 fprintf(stderr, "ERROR during encoding, state = %d:%s\n", encoder_wrapper.encoder->state, FLAC__EncoderStateString[encoder_wrapper.encoder->state]);
 424                                 goto raw_abort_;
 425                         }
 426                 }
 427         }
 428
 429         if(encoder_wrapper.encoder) {
 430                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 431                         FLAC__encoder_finish(encoder_wrapper.encoder);
 432                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 433         }
 434         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0) {
 435                 print_stats(&encoder_wrapper);
 436                 printf("\n");
 437         }
 438         if(verify) {
 439                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 440                         printf("Verify FAILED!  Do not use %s\n", outfile);
 441                         return 1;
 442                 }
 443                 else {
 444                         printf("Verify succeeded\n");
 445                 }
 446         }
 447         fclose(fin);
 448         return 0;
 449 raw_abort_:
 450         if(encoder_wrapper.verbose && encoder_wrapper.total_samples_to_encode > 0)
 451                 printf("\n");
 452         if(encoder_wrapper.encoder) {
 453                 if(encoder_wrapper.encoder->state == FLAC__ENCODER_OK)
 454                         FLAC__encoder_finish(encoder_wrapper.encoder);
 455                 FLAC__encoder_free_instance(encoder_wrapper.encoder);
 456         }
 457         if(verify) {
 458                 if(encoder_wrapper.verify_fifo.result != FLAC__VERIFY_OK) {
 459                         printf("Verify FAILED!  Do not use %s\n", outfile);
 460                         return 1;
 461                 }
 462                 else {
 463                         printf("Verify succeeded\n");
 464                 }
 465         }
 466         fclose(fin);
 467         unlink(outfile);
 468         return 1;
 469 }
 470
 471 bool init(encoder_wrapper_struct *encoder_wrapper)
 472 {
 473         unsigned i;
 474         uint32 test = 1;
 475
 476         is_big_endian_host = (*((byte*)(&test)))? false : true;
 477
 478         for(i = 0; i < FLAC__MAX_CHANNELS; i++)
 479                 input[i] = &(in[i][0]);
 480
 481         encoder_wrapper->encoder = FLAC__encoder_get_new_instance();
 482         if(0 == encoder_wrapper->encoder) {
 483                 fprintf(stderr, "ERROR creating the encoder instance\n");
 484                 return false;
 485         }
 486
 487         return true;
 488 }
 489
 490 bool init_encoder(bool lax, bool do_mid_side, bool loose_mid_side, bool do_exhaustive_model_search, bool do_qlp_coeff_prec_search, unsigned rice_optimization_level, unsigned max_lpc_order, unsigned blocksize, unsigned qlp_coeff_precision, unsigned channels, unsigned bps, unsigned sample_rate, unsigned padding, encoder_wrapper_struct *encoder_wrapper)
 491 {
 492         if(channels != 2 || bps > 16)
 493                 do_mid_side = loose_mid_side = false;
 494
 495         if(encoder_wrapper->verify) {
 496                 unsigned i;
 497
 498                 /* set up the fifo which will hold the original signal to compare against */
 499                 encoder_wrapper->verify_fifo.size = blocksize + CHUNK_OF_SAMPLES;
 500                 for(i = 0; i < channels; i++) {
 501                         if(0 == (encoder_wrapper->verify_fifo.original[i] = (int32*)malloc(sizeof(int32) * encoder_wrapper->verify_fifo.size))) {
 502                                 fprintf(stderr, "ERROR allocating verify buffers\n");
 503                                 return false;
 504                         }
 505                 }
 506                 encoder_wrapper->verify_fifo.tail = 0;
 507                 encoder_wrapper->verify_fifo.into_frames = false;
 508                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_OK;
 509
 510                 /* set up a stream decoder for verification */
 511                 encoder_wrapper->verify_fifo.decoder = FLAC__stream_decoder_get_new_instance();
 512                 if(0 == encoder_wrapper->verify_fifo.decoder) {
 513                         fprintf(stderr, "ERROR creating the verify decoder instance\n");
 514                         return false;
 515                 }
 516                 if(FLAC__stream_decoder_init(encoder_wrapper->verify_fifo.decoder, verify_read_callback, verify_write_callback, verify_metadata_callback, verify_error_callback, encoder_wrapper) != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA) {
 517                         fprintf(stderr, "ERROR initializing decoder, state = %d:%s\n", encoder_wrapper->verify_fifo.decoder->state, FLAC__StreamDecoderStateString[encoder_wrapper->verify_fifo.decoder->state]);
 518                         return false;
 519                 }
 520         }
 521
 522         encoder_wrapper->encoder->streamable_subset = !lax;
 523         encoder_wrapper->encoder->channels = channels;
 524         encoder_wrapper->encoder->bits_per_sample = bps;
 525         encoder_wrapper->encoder->sample_rate = sample_rate;
 526         encoder_wrapper->encoder->blocksize = blocksize;
 527         encoder_wrapper->encoder->qlp_coeff_precision = qlp_coeff_precision;
 528         encoder_wrapper->encoder->max_lpc_order = max_lpc_order;
 529         encoder_wrapper->encoder->do_mid_side_stereo = do_mid_side;
 530         encoder_wrapper->encoder->loose_mid_side_stereo = loose_mid_side;
 531         encoder_wrapper->encoder->do_exhaustive_model_search = do_exhaustive_model_search;
 532         encoder_wrapper->encoder->do_qlp_coeff_prec_search = do_qlp_coeff_prec_search;
 533         encoder_wrapper->encoder->rice_optimization_level = rice_optimization_level;
 534         encoder_wrapper->encoder->total_samples_estimate = encoder_wrapper->total_samples_to_encode;
 535         encoder_wrapper->encoder->padding = padding;
 536
 537         if(FLAC__encoder_init(encoder_wrapper->encoder, write_callback, metadata_callback, encoder_wrapper) != FLAC__ENCODER_OK) {
 538                 fprintf(stderr, "ERROR initializing encoder, state = %d\n", encoder_wrapper->encoder->state);
 539                 return false;
 540         }
 541
 542         return true;
 543 }
 544
 545 void format_input(unsigned wide_samples, bool is_big_endian, bool is_unsigned_samples, unsigned channels, unsigned bps, encoder_wrapper_struct *encoder_wrapper)
 546 {
 547         unsigned wide_sample, sample, channel, byte;
 548
 549         if(bps == 8) {
 550                 if(is_unsigned_samples) {
 551                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 552                                 for(channel = 0; channel < channels; channel++, sample++)
 553                                         input[channel][wide_sample] = (int32)ucbuffer[sample] - 128;
 554                 }
 555                 else {
 556                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 557                                 for(channel = 0; channel < channels; channel++, sample++)
 558                                         input[channel][wide_sample] = (int32)scbuffer[sample];
 559                 }
 560         }
 561         else {
 562                 if(is_big_endian != is_big_endian_host) {
 563                         unsigned char tmp;
 564                         const unsigned bytes = wide_samples * channels * (bps >> 3);
 565                         for(byte = 0; byte < bytes; byte += 2) {
 566                                 tmp = ucbuffer[byte];
 567                                 ucbuffer[byte] = ucbuffer[byte+1];
 568                                 ucbuffer[byte+1] = tmp;
 569                         }
 570                 }
 571                 if(is_unsigned_samples) {
 572                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 573                                 for(channel = 0; channel < channels; channel++, sample++)
 574                                         input[channel][wide_sample] = (int32)usbuffer[sample] - 32768;
 575                 }
 576                 else {
 577                         for(sample = wide_sample = 0; wide_sample < wide_samples; wide_sample++)
 578                                 for(channel = 0; channel < channels; channel++, sample++)
 579                                         input[channel][wide_sample] = (int32)ssbuffer[sample];
 580                 }
 581         }
 582
 583         if(encoder_wrapper->verify) {
 584                 for(channel = 0; channel < channels; channel++)
 585                         memcpy(&encoder_wrapper->verify_fifo.original[channel][encoder_wrapper->verify_fifo.tail], &input[channel][0], sizeof(int32) * wide_samples);
 586                 encoder_wrapper->verify_fifo.tail += wide_samples;
 587                 assert(encoder_wrapper->verify_fifo.tail <= encoder_wrapper->verify_fifo.size);
 588         }
 589 }
 590
 591 FLAC__EncoderWriteStatus write_callback(const FLAC__Encoder *encoder, const byte buffer[], unsigned bytes, unsigned samples, unsigned current_frame, void *client_data)
 592 {
 593         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 594         unsigned mask = (encoder->do_exhaustive_model_search || encoder->do_qlp_coeff_prec_search)? 0x07 : 0x1f;
 595
 596         encoder_wrapper->bytes_written += bytes;
 597         encoder_wrapper->samples_written += samples;
 598         encoder_wrapper->current_frame = current_frame;
 599
 600         if(samples && encoder_wrapper->verbose && encoder_wrapper->total_samples_to_encode > 0 && !(current_frame & mask))
 601                 print_stats(encoder_wrapper);
 602
 603         if(encoder_wrapper->verify) {
 604                 encoder_wrapper->verify_fifo.encoded_signal = buffer;
 605                 encoder_wrapper->verify_fifo.encoded_bytes = bytes;
 606                 if(encoder_wrapper->verify_fifo.into_frames) {
 607                         if(!FLAC__stream_decoder_process_one_frame(encoder_wrapper->verify_fifo.decoder)) {
 608                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_FRAME;
 609                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 610                         }
 611                 }
 612                 else {
 613                         if(!FLAC__stream_decoder_process_metadata(encoder_wrapper->verify_fifo.decoder)) {
 614                                 encoder_wrapper->verify_fifo.result = FLAC__VERIFY_FAILED_IN_METADATA;
 615                                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 616                         }
 617                 }
 618         }
 619
 620         if(fwrite(buffer, sizeof(byte), bytes, encoder_wrapper->fout) == bytes)
 621                 return FLAC__ENCODER_WRITE_OK;
 622         else
 623                 return FLAC__ENCODER_WRITE_FATAL_ERROR;
 624 }
 625
 626 void metadata_callback(const FLAC__Encoder *encoder, const FLAC__StreamMetaData *metadata, void *client_data)
 627 {
 628         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 629         byte b;
 630         FILE *f;
 631         const uint64 samples = metadata->data.stream_info.total_samples;
 632         const unsigned min_framesize = metadata->data.stream_info.min_framesize;
 633         const unsigned max_framesize = metadata->data.stream_info.max_framesize;
 634
 635         (void)encoder; /* silence compiler warning about unused parameter */
 636
 637         if(encoder_wrapper->fout == stdout)
 638                 return;
 639
 640         fclose(encoder_wrapper->fout);
 641         if(0 == (f = fopen(encoder_wrapper->outfile, "r+b")))
 642                 return;
 643
 644         /* all this is based on intimate knowledge of the stream header
 645          * layout, but a change to the header format that would break this
 646          * would also break all streams encoded in the previous format.
 647          */
 648
 649         if(-1 == fseek(f, 26, SEEK_SET)) goto samples_;
 650         fwrite(metadata->data.stream_info.md5sum, 1, 16, f);
 651
 652 samples_:
 653         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 654         if(fread(&b, 1, 1, f) != 1) goto framesize_;
 655         if(-1 == fseek(f, 21, SEEK_SET)) goto framesize_;
 656         b = (b & 0xf0) | (byte)((samples >> 32) & 0x0F);
 657         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 658         b = (byte)((samples >> 24) & 0xFF);
 659         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 660         b = (byte)((samples >> 16) & 0xFF);
 661         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 662         b = (byte)((samples >> 8) & 0xFF);
 663         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 664         b = (byte)(samples & 0xFF);
 665         if(fwrite(&b, 1, 1, f) != 1) goto framesize_;
 666
 667 framesize_:
 668         if(-1 == fseek(f, 12, SEEK_SET)) goto end_;
 669         b = (byte)((min_framesize >> 16) & 0xFF);
 670         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 671         b = (byte)((min_framesize >> 8) & 0xFF);
 672         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 673         b = (byte)(min_framesize & 0xFF);
 674         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 675         b = (byte)((max_framesize >> 16) & 0xFF);
 676         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 677         b = (byte)((max_framesize >> 8) & 0xFF);
 678         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 679         b = (byte)(max_framesize & 0xFF);
 680         if(fwrite(&b, 1, 1, f) != 1) goto end_;
 681 end_:
 682         fclose(f);
 683         return;
 684 }
 685
 686 FLAC__StreamDecoderReadStatus verify_read_callback(const FLAC__StreamDecoder *decoder, byte buffer[], unsigned *bytes, void *client_data)
 687 {
 688         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 689         const unsigned encoded_bytes = encoder_wrapper->verify_fifo.encoded_bytes;
 690         (void)decoder;
 691
 692         if(encoded_bytes <= *bytes) {
 693                 *bytes = encoded_bytes;
 694                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 695         }
 696         else {
 697                 memcpy(buffer, encoder_wrapper->verify_fifo.encoded_signal, *bytes);
 698                 encoder_wrapper->verify_fifo.encoded_signal += *bytes;
 699                 encoder_wrapper->verify_fifo.encoded_bytes -= *bytes;
 700         }
 701
 702         return FLAC__STREAM_DECODER_READ_CONTINUE;
 703 }
 704
 705 FLAC__StreamDecoderWriteStatus verify_write_callback(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data)
 706 {
 707         encoder_wrapper_struct *encoder_wrapper = (encoder_wrapper_struct *)client_data;
 708         unsigned channel, l, r;
 709
 710         for(channel = 0; channel < decoder->channels; channel++) {
 711                 if(0 != memcmp(buffer[channel], encoder_wrapper->verify_fifo.original[channel], sizeof(int32) * decoder->blocksize)) {
 712                         fprintf(stderr, "\nERROR: mismatch in decoded data, verify FAILED!\n");
 713                         fprintf(stderr, "       Please submit a bug report to http://sourceforge.net/bugs/?func=addbug&group_id=13478\n");
 714                         return FLAC__STREAM_DECODER_WRITE_ABORT;
 715                 }
 716         }
 717         /* dequeue the frame from the fifo */
 718         for(channel = 0; channel < decoder->channels; channel++) {
 719                 for(l = 0, r = frame->header.blocksize; r < encoder_wrapper->verify_fifo.tail; l++, r++) {
 720                         encoder_wrapper->verify_fifo.original[channel][l] = encoder_wrapper->verify_fifo.original[channel][r];
 721                 }
 722         }
 723         encoder_wrapper->verify_fifo.tail -= frame->header.blocksize;
 724         return FLAC__STREAM_DECODER_WRITE_CONTINUE;
 725 }
 726
 727 void verify_metadata_callback(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
 728 {
 729         (void)decoder;
 730         (void)metadata;
 731         (void)client_data;
 732 }
 733
 734 void verify_error_callback(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
 735 {
 736         (void)decoder;
 737         (void)client_data;
 738         fprintf(stderr, "\nERROR: verification decoder returned error %d:%s\n", status, FLAC__StreamDecoderErrorStatusString[status]);
 739 }
 740
 741 void print_stats(const encoder_wrapper_struct *encoder_wrapper)
 742 {
 743 #ifdef _MSC_VER
 744         /* with VC++ you have to spoon feed it the casting */
 745         double progress = (double)(int64)encoder_wrapper->samples_written / (double)(int64)encoder_wrapper->total_samples_to_encode;
 746 #else
 747         double progress = (double)encoder_wrapper->samples_written / (double)encoder_wrapper->total_samples_to_encode;
 748 #endif
 749         printf("\r%0.2f%% complete: frame %u, wrote %u bytes, %u of %u samples, ratio = %5.3f",
 750                 progress * 100.0, encoder_wrapper->current_frame,
 751                 (unsigned)encoder_wrapper->bytes_written, (unsigned)encoder_wrapper->samples_written, (unsigned)encoder_wrapper->total_samples_to_encode,
 752 #ifdef _MSC_VER
 753                 /* with VC++ you have to spoon feed it the casting */
 754                 (double)(int64)encoder_wrapper->bytes_written / ((double)(int64)encoder_wrapper->unencoded_size * progress)
 755 #else
 756                 (double)encoder_wrapper->bytes_written / ((double)encoder_wrapper->unencoded_size * progress)
 757 #endif
 758         );
 759         fflush(stdout);
 760 }
 761
 762 bool read_little_endian_uint16(FILE *f, uint16 *val, bool eof_ok)
 763 {
 764         size_t bytes_read = fread(val, 1, 2, f);
 765
 766         if(bytes_read == 0) {
 767                 if(!eof_ok) {
 768                         fprintf(stderr, "ERROR: unexpected EOF\n");
 769                         return false;
 770                 }
 771                 else
 772                         return true;
 773         }
 774         else if(bytes_read < 2) {
 775                 fprintf(stderr, "ERROR: unexpected EOF\n");
 776                 return false;
 777         }
 778         else {
 779                 if(is_big_endian_host) {
 780                         byte tmp, *b = (byte*)val;
 781                         tmp = b[1]; b[1] = b[0]; b[0] = tmp;
 782                 }
 783                 return true;
 784         }
 785 }
 786
 787 bool read_little_endian_uint32(FILE *f, uint32 *val, bool eof_ok)
 788 {
 789         size_t bytes_read = fread(val, 1, 4, f);
 790
 791         if(bytes_read == 0) {
 792                 if(!eof_ok) {
 793                         fprintf(stderr, "ERROR: unexpected EOF\n");
 794                         return false;
 795                 }
 796                 else
 797                         return true;
 798         }
 799         else if(bytes_read < 4) {
 800                 fprintf(stderr, "ERROR: unexpected EOF\n");
 801                 return false;
 802         }
 803         else {
 804                 if(is_big_endian_host) {
 805                         byte tmp, *b = (byte*)val;
 806                         tmp = b[3]; b[3] = b[0]; b[0] = tmp;
 807                         tmp = b[2]; b[2] = b[1]; b[1] = tmp;
 808                 }
 809                 return true;
 810         }
 811 }